Revert "feat: add typosquatting detection and D3 family tree visualization"

[Mrinalray]

Reverts #143

[Antra1705]

Hi @Mrinalray — I see you've opened a revert. Before merging this, could you let me know what the specific issue was? I'd like to fix it rather than have the feature reverted.
If the tree wasn't visible, it requires the backend to be running (node server.js) with a valid API_KEY in .env — the tree only renders after a successful /check response returns the typosquatting payload. Happy to address any issues in a follow-up PR or patch this one directly.